From e17e4b34a81a1b4490ae0aa9f0752951d027e75c Mon Sep 17 00:00:00 2001
From: Pawel Lampe <pawel.lampe@gmail.com>
Date: Mon, 4 Apr 2022 23:03:14 +0200
Subject: [PATCH] Fix debug navmesh errors

---
 scene/resources/navigation_mesh.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scene/resources/navigation_mesh.cpp b/scene/resources/navigation_mesh.cpp
index 47a87bdea57..552fa84bad9 100644
--- a/scene/resources/navigation_mesh.cpp
+++ b/scene/resources/navigation_mesh.cpp
@@ -388,6 +388,10 @@ Ref<Mesh> NavigationMesh::get_debug_mesh() {
 
 	debug_mesh = Ref<ArrayMesh>(memnew(ArrayMesh));
 
+	if (!lines.size()) {
+		return debug_mesh;
+	}
+
 	Array arr;
 	arr.resize(Mesh::ARRAY_MAX);
 	arr[Mesh::ARRAY_VERTEX] = varr;